The New Jersey Supreme Court will decide whether police can obtain search warrants for cellphone bills without first getting a judge’s approval, a change that could drastically open up such searches.

The case, State v. Gary Lunsford, involves a narcotics investigation, in which prosecutors attempted to obtain cell phone billing and call records without going through the traditional warrant process. Lunsford, 24, from Asbury Park, was arrested in May 2014 for distributing cocaine.